/Engine/Source/Editor/BlueprintGraph/Public/BlueprintGraphModule.h
void RegisterGraphAction ( const [UClass](API\Runtime\CoreUObject\UObject\UClass) * AssetType, [TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [FAssetBlueprintGraphActions](API\Editor\BlueprintGraph\FAssetBlueprintGraphActions) > Action )